56643359 has 2 divisors, whose sum is σ = 56643360. Its totient is φ = 56643358.

The previous prime is 56643331. The next prime is 56643361. The reversal of 56643359 is 95334665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56643359 - 2¹⁶ = 56577823 is a prime.

Together with 56643361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56643329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28321679 + 28321680.

It is an arithmetic number, because the mean of its divisors is an integer number (28321680).

Almost surely, 2^56643359 is an apocalyptic number.

56643359 is a deficient number, since it is larger than the sum of its proper divisors (1).

56643359 is an equidigital number, since it uses as much as digits as its factorization.

56643359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 41.

The square root of 56643359 is about 7526.1782466269. The cubic root of 56643359 is about 384.0457822114.

The spelling of 56643359 in words is "fifty-six million, six hundred forty-three thousand, three hundred fifty-nine".